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How long can I store a charged battery?

Discussion in 'Phantom FC40 Discussion' started by hakasan, Nov 30, 2014.

  1. hakasan

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    Hi guys. Just recieved my phantom fc 40. had my maiden flight. what an awsome machine. it flies gracefully. Loving it.
    A couple of questions I have on correct battery usage Are
    [I'm probably only going to be flying it on the weekends.}
    So:
    1)With what charge should I store the batteries (the original 2200 DJI lipo) if left unused for periods up to 7 days?
    2)Should I leave them as I did when I used them in the phantom (up to the red light warning) charge
    3) Will I damage the battery if left fully charged? I have 3 fully charged batteries and won't be able to use them for 7 days
    4) how do I discharge the Lipo (without flying)

    thank you for your help. a couple of photos of my first flight
     

    Attached Files:

  2. wattage

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    Hi. Tolerances can be quite tight for storage voltage. If you're frequently having to leave batteries unused for a week at a time, it's definitely not recommended to leave them fully charged for that time or their life span will decrease.

    The chances are you're going to build up a collection of batteries over time so you should get a better charger than the one included with the FC-40. If you get something like an Imax B6AC, you can set it to charge/discharge to a safe storage voltage, which is typically 3.75v per cell of your 3 cell battery.

    http://www.hobbyking.com/hobbyking/...ac_charger_discharger_1_6_cells_genuine_.html
     
  3. hakasan

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    thank you!!! any chance I can discharge them without flying?
    Thanks!!!
     
  4. LandYachtMedia

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    I have a Venom battery charger that I use with my other LiPOs. It has a "storage" program that will either charge or discharge the battery to a safe level. You just connect it and hit start.
     
  5. hakasan

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    Thanks!! I guess I´ll have to buy one as well.
    do you think that storing them for a week with the battery charge left from a flight (not o but the red light warnign) is ok?

    Thanks!!
     
  6. LandYachtMedia

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    Storing them with a lower charge is safer than with a high charge state. The problem with a low charge is that if the battery cell voltage drops too low it quickly damages the battery. If you have a couple of lights showing on the battery when you land you won't be at risk of damage.
     
  7. wattage

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    FC-40 doesn't use the Phantom 2 smart battery.
     
  8. LandYachtMedia

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    Quite right. If you haven't reached the low battery warning you will be fine storing it for a short time.
     
  9. Vintage Mark

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    Until you get a charger that will charge/discharge to storage state it is easy to fully charge, then hover for 3 or 4 minutes. With stock battery, that will be close enough to not be at risk from too high, or too low charge state for storage.
     
  10. 2014fc40

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    OK for all of us that don't fly all the time, lets say we store fully charged batteries for 2 months. Whats the educated info on this? I will pull them and charge them before I fly next time. Would that be bad>?

    That's my MO. Seems ok for now.
     
  11. wattage

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    Read this article. An entertaining and exhaustive explanation of lipos.

    http://www.rchelicopterfun.com/rc-lipo-batteries.html
     
  12. Beario

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    Good read this has changed things a bit for me with LIPO's lots of really good into thank you for posting!